SPF Record Issue

Roman Gelfand <[email protected]> Mon, 9 Sep 2013 11:52:19 -0400
Newsgroups gmane.mail.spam.spf.discuss
Message-ID <CAJbW+rnz8+ET51d6Bajo1_h8aTtHTZPsi3VTC5E27CmcTnVYSw@mail.gmail.com>
I have added the spf text record, below.  The first and second subnets
are being checked.  However, when sending email from 3rd and 4th
subnet, spf check fails.  Does this mean only 2 subnets could be
specified.  If so, what to when there is more subnets?

v=spf1 ip4:xx.xxx.0.0/14 ip4:24.yy.yyy.yyy.80/29 ip4:zz.zz.zz.24/29
ip4:uuu.uu.uuu.0/29 -all

Thanks in advance